Citazione Stile APA (7a Edizione)

FREY, P. R. (1969). Chemistry problems: And how to solve them. Barnes & Noble.

Citazione stile Chigago Style (17a edizione)

FREY, Paul R. Chemistry Problems: And How to Solve Them. New York: Barnes & Noble, 1969.

Citatione MLA (9a ed.)

FREY, Paul R. Chemistry Problems: And How to Solve Them. Barnes & Noble, 1969.