APA (7 वां संस्करण) प्रशस्ति पत्र

SEHGAL, S., & SEHGAL, S. (1980). A Text Book On Highway Engineering And Airports For Degree And A.m. E. Students S.b. Sehgal And K.l. Bhanot. S. Chand & Company.

शिकागो शैली (17वां संस्करण) प्रशस्ति पत्र

SEHGAL, S.B, और S.B SEHGAL. A Text Book On Highway Engineering And Airports For Degree And A.m. E. Students S.b. Sehgal And K.l. Bhanot. S. Chand & Company, 1980.

एमएलए (8वां संस्करण) प्रशस्ति पत्र

SEHGAL, S.B, और S.B SEHGAL. A Text Book On Highway Engineering And Airports For Degree And A.m. E. Students S.b. Sehgal And K.l. Bhanot. S. Chand & Company, 1980.

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