एपीए उद्धरण

Walters, T., & Osborne, R. Cycad classification: Concepts and recommendations.

शिकागो स्टाइल उद्धरण

Walters, Terrence, और Roy Osborne. Cycad Classification: Concepts and Recommendations.

एमएलए उद्धरण

Walters, Terrence, और Roy Osborne. Cycad Classification: Concepts and Recommendations.