APA
Gupta G.S, . (1990). Managerial Economics. New Delhi: Tata MC Graw Hill.
Chicago
Gupta G.S, . 1990. Managerial Economics. New Delhi: Tata MC Graw Hill.
Harvard
Gupta G.S, . (1990). Managerial Economics. New Delhi: Tata MC Graw Hill.
MLA
Gupta G.S, . Managerial Economics. New Delhi: Tata MC Graw Hill. 1990.