Cita APA (7a ed.)

Eichler, G. A., Parks, C. G., & Lehman, J. (1973). Continental practice exercises in English. Continental Press.

Cita Chicago Style (17a ed.)

Eichler, G. A., Carroll G. Parks, y John Lehman. Continental Practice Exercises in English. Elizabethtown, Pa. : Atlanta [etc.]: Continental Press, 1973.

Cita MLA (8a ed.)

Eichler, G. A., et al. Continental Practice Exercises in English. Continental Press, 1973.