APA
Kumar K., . (1992). What is worth teaching ?. Hyderabad: Orient Longman.
Chicago
Kumar Krishna, . 1992. What is worth teaching ?. Hyderabad: Orient Longman.
Harvard
Kumar K., . (1992). What is worth teaching ?. Hyderabad: Orient Longman.
MLA
Kumar Krishna, . What is worth teaching ?. Hyderabad: Orient Longman. 1992.