APA
Salvatore D., Diulio E. A., . (1983). Schaum's outline of theory and problems of principles of economics. Singapore: McGraw-Hill.
Chicago
Salvatore Dominick, Diulio Eugene A, . 1983. Schaum's outline of theory and problems of principles of economics. Singapore: McGraw-Hill.
Harvard
Salvatore D., Diulio E. A., . (1983). Schaum's outline of theory and problems of principles of economics. Singapore: McGraw-Hill.
MLA
Salvatore Dominick, Diulio Eugene A, . Schaum's outline of theory and problems of principles of economics. Singapore: McGraw-Hill. 1983.