APA (7th ed.) Citation

Frey, R. (1927). Philippinische Dipteren.

Chicago Style (17th ed.) Citation

Frey, Richard. Philippinische Dipteren. Helsingfors, 1927.

MLA (9th ed.) Citation

Frey, Richard. Philippinische Dipteren. 1927.

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