Cita APA (7a ed.)

Collett, D., & Spencer, M. (1998). German for starters: Study book.

Cita Chicago Style (17a ed.)

Collett, Diane, y Michael Spencer. German for Starters: Study Book. Cambridge, 1998.

Cita MLA (9a ed.)

Collett, Diane, y Michael Spencer. German for Starters: Study Book. 1998.