Cita APA (7th ed.)

Weidensaul, S. (1992). Fossil identifier. Mallard Pr.

Cita Chicago (17th ed.)

Weidensaul, Scott. Fossil Identifier. London: Mallard Pr, 1992.

Cita MLA (9th ed.)

Weidensaul, Scott. Fossil Identifier. Mallard Pr, 1992.