APA
Hunter David, . (1994). Concepts and Principles of International Environmental Law : An Introduction. SWITZERLAND: UNEP.
Chicago
Hunter David, . 1994. Concepts and Principles of International Environmental Law : An Introduction. SWITZERLAND: UNEP.
Harvard
Hunter David, . (1994). Concepts and Principles of International Environmental Law : An Introduction. SWITZERLAND: UNEP.
MLA
Hunter David, . Concepts and Principles of International Environmental Law : An Introduction. SWITZERLAND: UNEP. 1994.