Rogers, C. R., & Stevens, B. (1971). Person to person: The problem of being human. Pocket Books.
Citazione stile Chigago Style (17a edizione)Rogers, Carl R., e Barry Stevens. Person to Person: The Problem of Being Human. [Walnut Creek, Calif: Pocket Books, 1971.
Citatione MLA (9a ed.)Rogers, Carl R., e Barry Stevens. Person to Person: The Problem of Being Human. Pocket Books, 1971.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.