Frey, P. R. (1965). Chemistry problems and how to solve them. New York: Barnes and Noble.
Trích dẫn kiểu ChicagoFrey, Paul R. Chemistry Problems and How to Solve Them. New York: Barnes and Noble, 1965.
MLA引文Frey, Paul R. Chemistry Problems and How to Solve Them. New York: Barnes and Noble, 1965.
警告：這些引文格式不一定是100％准確.