APA

Harper J. L., . (1977). Population biology of plants. London [u.a.]: Academic Press.

Chicago

Harper John L, . 1977. Population biology of plants. London [u.a.]: Academic Press.

Harvard

Harper J. L., . (1977). Population biology of plants. London [u.a.]: Academic Press.

MLA

Harper John L, . Population biology of plants. London [u.a.]: Academic Press. 1977.