Martinson, T. H. (1991). Supercourse for the GRE (2nd ed.). Prentice-Hall.
Chicago Style aipamenaMartinson, Thomas H. Supercourse for the GRE. 2nd ed. New York: Prentice-Hall, 1991.
MLA aipamenaMartinson, Thomas H. Supercourse for the GRE. 2nd ed. Prentice-Hall, 1991.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.