APA

Puri A. N., . (1960). BSc practical physics. : Atma Ram & Sons, New Delhi.

Chicago

Puri A N, . 1960. BSc practical physics. : Atma Ram & Sons, New Delhi.

Harvard

Puri A. N., . (1960). BSc practical physics. : Atma Ram & Sons, New Delhi.

MLA

Puri A N, . BSc practical physics. : Atma Ram & Sons, New Delhi. 1960.