APA (7th ed.) Citation

Günther, A. C. L. G. An introduction to the study of fishes.

Chicago Style (17th ed.) Citation

Günther, Albert C. L. G. An Introduction to the Study of Fishes.

MLA (9th ed.) Citation

Günther, Albert C. L. G. An Introduction to the Study of Fishes.

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