Cain, H. T. (1950). Petroglyphs of central Washington. University of Washington Press.
Cita Chicago Style (17a ed.)Cain, H. Thomas. Petroglyphs of Central Washington. Seattle: University of Washington Press, 1950.
Cita MLA (8a ed.)Cain, H. Thomas. Petroglyphs of Central Washington. University of Washington Press, 1950.
Precaución: Estas citas no son 100% exactas.