Phelps, E., Strang, R. M., & Withrow, D. (1966). Gateways to readable books: An annotated graded list of books in many fields for adolescents who find reading difficult (4th ed.). H. W. Wilson.
Chicago Style aipamenaPhelps, Ethlyne, Ruth May Strang, and Dorothy Withrow. Gateways to Readable Books: An Annotated Graded List of Books in Many Fields for Adolescents Who Find Reading Difficult. 4th ed. New York: H. W. Wilson, 1966.
MLA aipamenaPhelps, Ethlyne, et al. Gateways to Readable Books: An Annotated Graded List of Books in Many Fields for Adolescents Who Find Reading Difficult. 4th ed. H. W. Wilson, 1966.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.