APA (7th ed.) Citation

Willins. (1997). The photographer's market guide to photo submission & portfolio formats. Writer's Digest Books.

Chicago Style (17th ed.) Citation

Willins. The Photographer's Market Guide to Photo Submission & Portfolio Formats. Cincinnati: Writer's Digest Books, 1997.

MLA (9th ed.) Citation

Willins. The Photographer's Market Guide to Photo Submission & Portfolio Formats. Writer's Digest Books, 1997.

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