Cita APA (7th ed.)

Campbell, R. N., & Lindfors, J. W. (1969). Insights into English structure: A programmed course. Prentice-Hall.

Cita Chicago (17th ed.)

Campbell, Russell N., i Judith W. Lindfors. Insights into English Structure: A Programmed Course. Englewood Cliffs, N. J: Prentice-Hall, 1969.

Cita MLA (9th ed.)

Campbell, Russell N., i Judith W. Lindfors. Insights into English Structure: A Programmed Course. Prentice-Hall, 1969.