APA

Botanical Society of America, Canadian Botanical Association, . (1989). Abstracts. s.l.]: [Botanical Society of America.

Chicago

Botanical Society of America, Canadian Botanical Association, . 1989. Abstracts. s.l.]: [Botanical Society of America.

Harvard

Botanical Society of America, Canadian Botanical Association, . (1989). Abstracts. s.l.]: [Botanical Society of America.

MLA

Botanical Society of America, Canadian Botanical Association, . Abstracts. s.l.]: [Botanical Society of America. 1989.