APA (7th ed.) Citation

Erdtman, G., & Straka, H. (1961). Cormophyte spore classification: An outline based on the apertures [tremata] ([Sonderdr.].).

Chicago Style (17th ed.) Citation

Erdtman, G., and Herbert Straka. Cormophyte Spore Classification: An Outline Based on the Apertures [tremata]. [Sonderdr.]. 1961.

MLA (9th ed.) Citation

Erdtman, G., and Herbert Straka. Cormophyte Spore Classification: An Outline Based on the Apertures [tremata]. [Sonderdr.]. 1961.

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