Larson, R. (1999). Passport to mathematics: Book 1. McDougal Littell.
Cita Chicago (17th ed.)Larson, Ron. Passport to Mathematics: Book 1. Evanston, Illinois: McDougal Littell, 1999.
Cita MLA (9th ed.)Larson, Ron. Passport to Mathematics: Book 1. McDougal Littell, 1999.
Atenció: Aquestes cites poden no estar 100% correctes.