Gaya APA

Tull, D, S., Hawkins, D, I. (1984). Marketing Research Third Edition Measurement and Method (3). United States of America: Macmillan Publ.Co..

Gaya MLA

Tull, Donald, S.., Hawkins, Del, I.. "Marketing Research Third Edition Measurement and Method". 3 United States of America: Macmillan Publ.Co., 1984. Textbook.