एपीए उद्धरण

Blackwelder, R. E. Taxonomy. John willey and sons inc.

शिकागो स्टाइल उद्धरण

Blackwelder, Richard E. Taxonomy. London: John willey and sons inc.

एमएलए उद्धरण

Blackwelder, Richard E. Taxonomy. John willey and sons inc.