APA (7th ed.) Citation

Costello, J. R. (1977). A generative grammar of old Frisian. Lang.

Chicago Style (17th ed.) Citation

Costello, John R. A Generative Grammar of Old Frisian. Bern: Lang, 1977.

MLA (9th ed.) Citation

Costello, John R. A Generative Grammar of Old Frisian. Lang, 1977.