APA (7th ed.) Citation

Lüdi, G., & Py, B. (1986). Etre bilingue. Lang.

Chicago Style (17th ed.) Citation

Lüdi, Georges, and Bernard Py. Etre Bilingue. Berne [u.a.]: Lang, 1986.

MLA (9th ed.) Citation

Lüdi, Georges, and Bernard Py. Etre Bilingue. Lang, 1986.