Niles, O. S. (1984). Skills for reading D. Sccott, Foresman.
Cita Chicago Style (17a ed.)Niles, Olive Stafford. Skills for Reading D. California, Estados Unidos: Sccott, Foresman, 1984.
Cita MLA (9a ed.)Niles, Olive Stafford. Skills for Reading D. Sccott, Foresman, 1984.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.