Citazione Stile APA (7a Edizione)

Walton, C. (1977). A Philippine language tree. Summer Institute of Linguistics.

Citazione stile Chigago Style (17a edizione)

Walton, Charles. A Philippine Language Tree. [Manila]: Summer Institute of Linguistics, 1977.

Citatione MLA (9a ed.)

Walton, Charles. A Philippine Language Tree. Summer Institute of Linguistics, 1977.