MLA

Van Erp, Allegonda Johanna Maria. The Phonetic Basis of Personality Ratings with Specific Reference to Cleft-palate Speech. Leidschendam: PTT Research, 1991.

APA

Van Erp, A. Johanna Maria. (1991). The phonetic basis of personality ratings with specific reference to Cleft-Palate speech. Leidschendam: PTT Research.

Chicago

Van Erp, Allegonda Johanna Maria, The Phonetic Basis of Personality Ratings with Specific Reference to Cleft-Palate Speech. Leidschendam: PTT Research, 1991.