Cita APA (7th ed.)

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

Cita Chicago (17th ed.)

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

Cita MLA (9th ed.)

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