United States. Environmental Data and Information Service, World Data Center A for Glaciology, & University of Colorado, Boulder. Institute of Arctic and Alpine Research. (1978). World Data Center A activities. World Data Center A for Glaciology [Snow and Ice], Institute of Arctic and Alpine Research, University of Colorado.
Παραπομπή σε μορφή Chicago (17η εκδ.)United States. Environmental Data and Information Service, World Data Center A for Glaciology, και Boulder. Institute of Arctic and Alpine Research University of Colorado. World Data Center A Activities. Boulder, Colo.: World Data Center A for Glaciology [Snow and Ice], Institute of Arctic and Alpine Research, University of Colorado, 1978.
Παραπομπή σε μορφή MLA (8th εκδ.)United States. Environmental Data and Information Service, et al. World Data Center A Activities. World Data Center A for Glaciology [Snow and Ice], Institute of Arctic and Alpine Research, University of Colorado, 1978.