APA

International Mountain Society, United Nations University, . (1981). Mountain research and development. Boulder (Colorado, EE.UU.): International Mountain Society.

Chicago

International Mountain Society, United Nations University, . 1981. Mountain research and development. Boulder (Colorado, EE.UU.): International Mountain Society.

Harvard

International Mountain Society, United Nations University, . (1981). Mountain research and development. Boulder (Colorado, EE.UU.): International Mountain Society.

MLA

International Mountain Society, United Nations University, . Mountain research and development. Boulder (Colorado, EE.UU.): International Mountain Society. 1981.