APA (7th ed.) Citation

Barber, H. G. Synoptic Keys to the Lygæidæ (Hemptera) of the United States. Wiley.

Chicago Style (17th ed.) Citation

Barber, H. G. Synoptic Keys to the Lygæidæ (Hemptera) Of the United States. Wiley.

MLA (9th ed.) Citation

Barber, H. G. Synoptic Keys to the Lygæidæ (Hemptera) Of the United States. Wiley.

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