Cita APA (7th ed.)
Esler, W. K., & Esler, M. K. (1984). Teaching elementary science (4th ed.). Wadsworth Pub. Co..
Cita Chicago (17th ed.)
Esler, William K., i Mary K. Esler. Teaching Elementary Science. 4th ed. Belmont, Calif.: Wadsworth Pub. Co., 1984.
Cita MLA (9th ed.)
Esler, William K., i Mary K. Esler. Teaching Elementary Science. 4th ed. Wadsworth Pub. Co., 1984.
Atenció: Aquestes cites poden no estar 100% correctes.