Citazione Stile APA (7a Edizione)

Birk, W. O. (1949). Structural grammar for building sentences. D.C. Heath.

Citazione stile Chigago Style (17a edizione)

Birk, William Otto. Structural Grammar for Building Sentences. Boston: D.C. Heath, 1949.

Citatione MLA (9a ed.)

Birk, William Otto. Structural Grammar for Building Sentences. D.C. Heath, 1949.