Cita APA (7a ed.)

Berulfsen, B., & Boardman, P. (1964). Elementary Norwegian: Draft of an audio-lingual method. University of Oslo International Summer School.

Cita Chicago Style (17a ed.)

Berulfsen, Bjarne, y Philip Boardman. Elementary Norwegian: Draft of an Audio-lingual Method. Oslo: University of Oslo International Summer School, 1964.

Cita MLA (9a ed.)

Berulfsen, Bjarne, y Philip Boardman. Elementary Norwegian: Draft of an Audio-lingual Method. University of Oslo International Summer School, 1964.