APA Citation

Erdtman, O. G. E. 1. (1957). Gymnospermae, Pteridophyta, Bryophyta. Stockholm: Almqvist & Wiksell.

Chicago Style Citation

Erdtman, Otto Gunnar Elias 1897-1973. Gymnospermae, Pteridophyta, Bryophyta. Stockholm: Almqvist & Wiksell, 1957.

MLA Citation

Erdtman, Otto Gunnar Elias 1897-1973. Gymnospermae, Pteridophyta, Bryophyta. Stockholm: Almqvist & Wiksell, 1957.

Warning: These citations may not always be 100% accurate.