Dyfyniad APA

Bickel, C. L., Eigenfeld, N. D., & Hogg, J. C. (1973). Physical science investigations. Houghton Mifflin.

Dyfyniad Arddull Chicago

Bickel, Charles Lester, Neal D. Eigenfeld, and John Clarence Hogg. Physical Science Investigations. Boston: Houghton Mifflin, 1973.

Dyfyniad MLA

Bickel, Charles Lester, et al. Physical Science Investigations. Houghton Mifflin, 1973.

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