MLA

de Vriendt, Séra, and Roland Willemyns. Sociolinguistic Aspects : Linguistic Research On Brussels. Clevedon (Pa.): Multilingual Matters, 1987.

APA

de Vriendt, S., & Willemyns, R. (1987). Sociolinguistic aspects : linguistic research on Brussels. Clevedon (Pa.): Multilingual Matters.

Chicago

de Vriendt, Séra, and Roland Willemyns. Sociolinguistic Aspects: Linguistic Research On Brussels. Clevedon (Pa.): Multilingual Matters, 1987.