Foster, L. Take a bite: The Sierra Club Kid's guide to hiking and backpacking (1st edition.).
Chicago-viite (17. p.)Foster, Lynne. Take a Bite: The Sierra Club Kid's Guide to Hiking and Backpacking. 1st edition. Toronto: Little Brown and Company, 1990.
MLA-viite (9. p.)Foster, Lynne. Take a Bite: The Sierra Club Kid's Guide to Hiking and Backpacking. 1st edition.
Varoitus: Nämä viitteet eivät aina ole täysin luotettavia.