APA (7th ed.) Citation

Cooper, G., & Cooper, G. (1997). Virtual field trips. Libraries Unlimited [u.a.].

Chicago Style (17th ed.) Citation

Cooper, Gail, and Garry Cooper. Virtual Field Trips. Englewood, Colo: Libraries Unlimited [u.a.], 1997.

MLA (9th ed.) Citation

Cooper, Gail, and Garry Cooper. Virtual Field Trips. Libraries Unlimited [u.a.], 1997.

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