APA
Harold L. Davis, . (1966). Scientific Research. New York: Mcgraw - hall book company.
Chicago
Harold L. Davis, . 1966. Scientific Research. New York: Mcgraw - hall book company.
Harvard
Harold L. Davis, . (1966). Scientific Research. New York: Mcgraw - hall book company.
MLA
Harold L. Davis, . Scientific Research. New York: Mcgraw - hall book company. 1966.