Dyfyniad APA

RENNER, J. W., Stafford, D. G., & COULTER, V. J. (1977). Variation: Learning science. MacMillan.

Dyfyniad Arddull Chicago

RENNER, John W., Don G. Stafford, and Vivian Jensen COULTER. Variation: Learning Science. New York: MacMillan, 1977.

Dyfyniad MLA

RENNER, John W., et al. Variation: Learning Science. MacMillan, 1977.

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