APA (7th ed.) Citation

Duckett, J. G., & Little, E. R. (1968). Mnium medium B.& S. in Britain: Subgenus Hippochaete ([Sonderdr.].).

Chicago Style (17th ed.) Citation

Duckett, Jeffrey G., and E. R. Little. Mnium Medium B.& S. in Britain: Subgenus Hippochaete. [Sonderdr.]. 1968.

MLA (9th ed.) Citation

Duckett, Jeffrey G., and E. R. Little. Mnium Medium B.& S. in Britain: Subgenus Hippochaete. [Sonderdr.]. 1968.