Klinckmann, E. (1970). Biology teacher's handbook (2nd ed.). John Wiley.
Cita Chicago (17th ed.)Klinckmann, Evelyn. Biology Teacher's Handbook. 2nd ed. New York: John Wiley, 1970.
Cita MLA (9th ed.)Klinckmann, Evelyn. Biology Teacher's Handbook. 2nd ed. John Wiley, 1970.
Atenció: Aquestes cites poden no estar 100% correctes.