Dyfyniad APA

Burchfield, J., Jacobs, M., & Kokrda, K. (1997). Photography in focus (Fifth edition.). NTC Pub. Group.

Dyfyniad Arddull Chicago

Burchfield, Jerry, Mark Jacobs, and Ken Kokrda. Photography in Focus. Fifth edition. Lincolnwood, Ill.: NTC Pub. Group, 1997.

Dyfyniad MLA

Burchfield, Jerry, et al. Photography in Focus. Fifth edition. NTC Pub. Group, 1997.

Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.