Citazione Stile APA (7a Edizione)

(1974). Oral English: Some techniques for teaching. Information Center Service.

Citazione stile Chigago Style (17a edizione)

Oral English: Some Techniques for Teaching. Washington, Estados Unidos: Information Center Service, 1974.

Citatione MLA (9a ed.)

Oral English: Some Techniques for Teaching. Information Center Service, 1974.