Citazione Stile APA (7a Edizione)

Voight, R. C. (1971). Invitation to learning: The learning center handbook. Acropolis Books.

Citazione stile Chigago Style (17a edizione)

Voight, Ralph Claude. Invitation to Learning: The Learning Center Handbook. Washington: Acropolis Books, 1971.

Citatione MLA (9a ed.)

Voight, Ralph Claude. Invitation to Learning: The Learning Center Handbook. Acropolis Books, 1971.