APA (7th ed.) Citation

Foster, L. O. (2005). Portland hill walks: Twenty explorations in parks and neighborhoods. Timber Press.

Chicago Style (17th ed.) Citation

Foster, Laura O. Portland Hill Walks: Twenty Explorations in Parks and Neighborhoods. Portland, Or.: Timber Press, 2005.

MLA (9th ed.) Citation

Foster, Laura O. Portland Hill Walks: Twenty Explorations in Parks and Neighborhoods. Timber Press, 2005.