APA (7th ed.) Citation

Friese, H., & Guglia, O. (1969). Die Bienen Europas (Apidae Europaeae). Asher.

Chicago Style (17th ed.) Citation

Friese, Heinrich, and Otto Guglia. Die Bienen Europas (Apidae Europaeae). Amsterdam: Asher, 1969.

MLA (9th ed.) Citation

Friese, Heinrich, and Otto Guglia. Die Bienen Europas (Apidae Europaeae). Asher, 1969.

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