Cita APA (7th ed.)

Levine, S., & Elzey, F. F. (1976). A programmed introduction to research (Expanded 2nd ed.). Wadsworth.

Cita Chicago (17th ed.)

Levine, Samuel, i Freeman F. Elzey. A Programmed Introduction to Research. Expanded 2nd ed. Belmont, Calif: Wadsworth, 1976.

Cita MLA (9th ed.)

Levine, Samuel, i Freeman F. Elzey. A Programmed Introduction to Research. Expanded 2nd ed. Wadsworth, 1976.