Zimmerman, F. (1989). English for science. Prentice Hall Regents.
Cita Chicago (17th ed.)Zimmerman, Fran. English for Science. Englewood Cliffs, N. J: Prentice Hall Regents, 1989.
Cita MLA (9th ed.)Zimmerman, Fran. English for Science. Prentice Hall Regents, 1989.
Atenció: Aquestes cites poden no estar 100% correctes.