APA

Ashby M., . (1969). Introduction to plant ecology. : Macmillan Company of Canada, Toronto.

Chicago

Ashby Maurice, . 1969. Introduction to plant ecology. : Macmillan Company of Canada, Toronto.

Harvard

Ashby M., . (1969). Introduction to plant ecology. : Macmillan Company of Canada, Toronto.

MLA

Ashby Maurice, . Introduction to plant ecology. : Macmillan Company of Canada, Toronto. 1969.