APA (7th ed.) Citation

Christensen, T. J., Christensen, N., & Christensen, E. (1971). Treasure hunters guide to Washington #2.

Chicago Style (17th ed.) Citation

Christensen, Tom J., Norma Christensen, and Ed Christensen. Treasure Hunters Guide to Washington #2. Spokane, Wash, 1971.

MLA (8th ed.) Citation

Christensen, Tom J., et al. Treasure Hunters Guide to Washington #2. 1971.

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