Cita APA (7a ed.)

Hamp, E. P., Gutiérrez, A. L., & Rankin, E. (1979). Composition plus level F. Harper and Row.

Cita Chicago Style (17a ed.)

Hamp, Eric P., Arturo Luis Gutiérrez, y Earl Rankin. Composition Plus Level F. Harper and Row, 1979.

Cita MLA (9a ed.)

Hamp, Eric P., et al. Composition Plus Level F. Harper and Row, 1979.