Παραπομπή APA

(1998). Guide to environment and development sources of information on CD-ROM and the internet. Nairobi: United Nations Environment Programme.

Παραπομπή Chicago Style

Guide to Environment and Development Sources of Information On CD-ROM and the Internet. Nairobi: United Nations Environment Programme, 1998.

Παραπομπή MLA

Guide to Environment and Development Sources of Information On CD-ROM and the Internet. Nairobi: United Nations Environment Programme, 1998.

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