Cita APA (7a ed.)
Pytel, A., & Singer, F. L. (1987). Strength of materials (4th ed.). Addsion-Wesley.
Cita Chicago Style (17a ed.)
Pytel, Andrew, y Ferdinand Leon Singer. Strength of Materials. 4th ed. california: Addsion-Wesley, 1987.
Cita MLA (9a ed.)
Pytel, Andrew, y Ferdinand Leon Singer. Strength of Materials. 4th ed. Addsion-Wesley, 1987.
Precaución: Estas citas no son 100% exactas.