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.
Dyfyniad Arddull ChicagoPhelps, 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.
Dyfyniad MLAPhelps, 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.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.