Gaya APA

Norback, T, A, &, A, F, O, A, A, C, T. (1981). The Allergy Encyclopedia . New York: A Plume Book.

Gaya MLA

Norback, The, Asthma, &, Allergy, Foundation, Of, America, And, Craig, T.. "The Allergy Encyclopedia". New York: A Plume Book, 1981. Text.