APA

Dave P.N, Gupta Daijit, . (1988). Operation blackboard: Essential facilities at the primary stage: Norms and specifications. New Delhi: NCERT.

Chicago

Dave P.N, Gupta Daijit, . 1988. Operation blackboard: Essential facilities at the primary stage: Norms and specifications. New Delhi: NCERT.

Harvard

Dave P.N, Gupta Daijit, . (1988). Operation blackboard: Essential facilities at the primary stage: Norms and specifications. New Delhi: NCERT.

MLA

Dave P.N, Gupta Daijit, . Operation blackboard: Essential facilities at the primary stage: Norms and specifications. New Delhi: NCERT. 1988.