APA

Prance G. T. 1. e., Elias T. S. e., . (1977). Extinction is forever : threatened and endangered species of plants in the Americas and their significance in ecosystems today and in the future : proceedings of a symposium held at the New York Botanical Garden, May 11-13, 1976, in commemoration of the Bicentennial of the United States of America. Bronx (N.Y.): New York Botanical Garden.

Chicago

Prance Ghillean T 1937 ed, Elias Thomas S ed, . 1977. Extinction is forever : threatened and endangered species of plants in the Americas and their significance in ecosystems today and in the future : proceedings of a symposium held at the New York Botanical Garden, May 11-13, 1976, in commemoration of the Bicentennial of the United States of America. Bronx (N.Y.): New York Botanical Garden.

Harvard

Prance G. T. 1. e., Elias T. S. e., . (1977). Extinction is forever : threatened and endangered species of plants in the Americas and their significance in ecosystems today and in the future : proceedings of a symposium held at the New York Botanical Garden, May 11-13, 1976, in commemoration of the Bicentennial of the United States of America. Bronx (N.Y.): New York Botanical Garden.

MLA

Prance Ghillean T 1937 ed, Elias Thomas S ed, . Extinction is forever : threatened and endangered species of plants in the Americas and their significance in ecosystems today and in the future : proceedings of a symposium held at the New York Botanical Garden, May 11-13, 1976, in commemoration of the Bicentennial of the United States of America. Bronx (N.Y.): New York Botanical Garden. 1977.