Gaya APA

Janse, M., Tol, S. (1999). Language death and language maintenance : theoretical, practical and descriptive approaches . Amsterdam: Jhon Benjamins Publishing Company.

Gaya MLA

Janse, Mark., Tol, Sijmen. "Language death and language maintenance : theoretical, practical and descriptive approaches". Amsterdam: Jhon Benjamins Publishing Company, 1999. Text.