Cita APA (7th ed.)

Gress, J. R., & Purpel, D. E. (1978). Curriculum: An introduction to the field. McCutchan.

Cita Chicago (17th ed.)

Gress, James R., i David E. Purpel. Curriculum: An Introduction to the Field. California: McCutchan, 1978.

Cita MLA (9th ed.)

Gress, James R., i David E. Purpel. Curriculum: An Introduction to the Field. McCutchan, 1978.