The physiology of flowering plants: their growth and development
[by] H. E. Street and Helgi Öpik.

APA Citation

Street, H. E. (Herbert Edward)., Öpik, H. (1970). The physiology of flowering plants: their growth and development. New York: American Elsevier.

MLA Citation

Street, H. E. (Herbert Edward), and Helgi Öpik. The Physiology of Flowering Plants: Their Growth And Development. New York: American Elsevier, 1970.

Warning: These citations may not always be complete (especially for serials).