Cita APA (7a ed.)

Crossgrove, H., Crossgrove, W. C., & Hagboldt, P. (1978). Graded German reader: Erste Stufe (2. ed.). Heath.

Cita Chicago Style (17a ed.)

Crossgrove, Hannelore, William C. Crossgrove, y Peter Hagboldt. Graded German Reader: Erste Stufe. 2. ed. Lexington, Mass: Heath, 1978.

Cita MLA (9a ed.)

Crossgrove, Hannelore, et al. Graded German Reader: Erste Stufe. 2. ed. Heath, 1978.