APA
(1971). Components and materials : part 7 September 1971. Philips India Ltd., Mumbai: .
Chicago
1971. Components and materials : part 7 September 1971. Philips India Ltd., Mumbai: .
Harvard
(1971). Components and materials : part 7 September 1971. Philips India Ltd., Mumbai: .
MLA
Components and materials : part 7 September 1971. Philips India Ltd., Mumbai: . 1971.