APA (7th ed.) Citation

Cross, F. B. Geographic Variation in the North American Cyprinid Fish, Hybopsis gracilis.

Chicago Style (17th ed.) Citation

Cross, Frank B. Geographic Variation in the North American Cyprinid Fish, Hybopsis Gracilis.

MLA (9th ed.) Citation

Cross, Frank B. Geographic Variation in the North American Cyprinid Fish, Hybopsis Gracilis.

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