Association of Geology Teachers (U.S.) & National Association of Geology Teachers. (1995). Journal of geological education. Association of Geology Teachers.
Чикаго-гийн эшлэл (17 дахь хэвлэлт)Association of Geology Teachers (U.S.) ба National Association of Geology Teachers. Journal of Geological Education. [Appleton, Wis.]: Association of Geology Teachers, 1995.
MLA -ийн эшлэл (9 дэх хэвлэлт)Association of Geology Teachers (U.S.) ба National Association of Geology Teachers. Journal of Geological Education. Association of Geology Teachers, 1995.
Анхааруулга: Эдгээр ишлэлүүд үргэлж 100% үнэн зөв биш байж магадгүй.