APA (7th ed.) Citation

Petrak, F. (1953). Index of fungi, 1920: List of new species and varieties of fungi, new combinations and new names published 1920 ([Sonderdr.].). Commonwealth Mycological Institute.

Chicago Style (17th ed.) Citation

Petrak, Franz. Index of Fungi, 1920: List of New Species and Varieties of Fungi, New Combinations and New Names Published 1920. [Sonderdr.]. Kew: Commonwealth Mycological Institute, 1953.

MLA (9th ed.) Citation

Petrak, Franz. Index of Fungi, 1920: List of New Species and Varieties of Fungi, New Combinations and New Names Published 1920. [Sonderdr.]. Commonwealth Mycological Institute, 1953.