APA-ийн эшлэл(7 дахь хэвлэлт)

Lord, T. R., & Travis, H. J. (2011). Schoolyard science: 101 easy and inexpensive activities. National Science Teachers Association.

Чикаго-гийн эшлэл (17 дахь хэвлэлт)

Lord, Thomas R., ба Holly J. Travis. Schoolyard Science: 101 Easy and Inexpensive Activities. Arlington, Va.: National Science Teachers Association, 2011.

MLA -ийн эшлэл (9 дэх хэвлэлт)

Lord, Thomas R., ба Holly J. Travis. Schoolyard Science: 101 Easy and Inexpensive Activities. National Science Teachers Association, 2011.