Cita APA (7a ed.)

Tisdell, M., & Barthofer, A. (1988). German for students aged eight and nine: (an aural (1. publ.). Univ. of Newcastle.

Cita Chicago Style (17a ed.)

Tisdell, Mariel, y Alfred Barthofer. German for Students Aged Eight and Nine: (an Aural. 1. publ. Newcastle: Univ. of Newcastle, 1988.

Cita MLA (9a ed.)

Tisdell, Mariel, y Alfred Barthofer. German for Students Aged Eight and Nine: (an Aural. 1. publ. Univ. of Newcastle, 1988.