Dyfyniad APA

Smith, D. L., & Gill, K. (2015). Parks directory of the United States. Omnigraphics.

Dyfyniad Arddull Chicago

Smith, Darren L., và Kay Gill. Parks Directory of the United States. Omnigraphics, 2015.

Dyfyniad MLA

Smith, Darren L., và Kay Gill. Parks Directory of the United States. Omnigraphics, 2015.

Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.