Budbill, D. (1979). Snowshoe trek to otter river. Bantam Skylark.
Cita Chicago Style (17a ed.)Budbill, David. Snowshoe Trek to Otter River. New York: Bantam Skylark, 1979.
Cita MLA (9a ed.)Budbill, David. Snowshoe Trek to Otter River. Bantam Skylark, 1979.
Precaución: Estas citas no son 100% exactas.