एपीए उद्धरण

Weller, J. M. (1960). Stratigraphic principles and practice. Universal Book Stall.

शिकागो स्टाइल उद्धरण

Weller, J. Marvin. Stratigraphic Principles and Practice. Delhi: Universal Book Stall, 1960.

एमएलए उद्धरण

Weller, J. Marvin. Stratigraphic Principles and Practice. Universal Book Stall, 1960.