APA
Gwartney J. D., Stroup R. L., . (1990). Economics private and public choice. San Diego: Harcourt Brace Jovanovich Publishers.
Chicago
Gwartney James D, Stroup Richard L, . 1990. Economics private and public choice. San Diego: Harcourt Brace Jovanovich Publishers.
Harvard
Gwartney J. D., Stroup R. L., . (1990). Economics private and public choice. San Diego: Harcourt Brace Jovanovich Publishers.
MLA
Gwartney James D, Stroup Richard L, . Economics private and public choice. San Diego: Harcourt Brace Jovanovich Publishers. 1990.