APA (7th ed.) Citation

Harbo, R. M. (1997). Shells & shellfish of the pacific northwesta field guide. Harbour.

Chicago Style (17th ed.) Citation

Harbo, Rick M. Shells & Shellfish of the Pacific Northwesta Field Guide. Harbour, 1997.

MLA (8th ed.) Citation

Harbo, Rick M. Shells & Shellfish of the Pacific Northwesta Field Guide. Harbour, 1997.

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