Frey, P. R., & ওৎরিহ, ক. এ. (1958). College chemistry. Prentice-Hall.
Cita Chicago (17th ed.)Frey, Paul R., i কবরঃয এ ওৎরিহ. College Chemistry. Englewood Cliffs, N.J.: Prentice-Hall, 1958.
Cita MLA (9th ed.)Frey, Paul R., i কবরঃয এ ওৎরিহ. College Chemistry. Prentice-Hall, 1958.
Atenció: Aquestes cites poden no estar 100% correctes.