APA (7th ed.) Citation

Evans, A. W. (1944). On Cladonia polycarpia Merrill.

Chicago Style (17th ed.) Citation

Evans, Alexander W. On Cladonia Polycarpia Merrill. s.l, 1944.

MLA (9th ed.) Citation

Evans, Alexander W. On Cladonia Polycarpia Merrill. 1944.

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