एपीए उद्धरण

Seward, A. C. (1966). Plant life through the ages: Geological and botanical retrospect. Hafner Pub. Co..

शिकागो स्टाइल उद्धरण

Seward, A. C. Plant Life Through the Ages: Geological and Botanical Retrospect. Hafner Pub. Co., 1966.

एमएलए उद्धरण

Seward, A. C. Plant Life Through the Ages: Geological and Botanical Retrospect. Hafner Pub. Co., 1966.