HANNIG, W. (1988). Towards A Blue Revolution Wolfgang Hannig. Gajah Mada University Press.
Cita Chicago Style (17a ed.)HANNIG, Wolfgang. Towards A Blue Revolution Wolfgang Hannig. Gajah Mada University Press, 1988.
Cita MLA (8a ed.)HANNIG, Wolfgang. Towards A Blue Revolution Wolfgang Hannig. Gajah Mada University Press, 1988.
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