Widjiono, W. (1989). Mengenal tanah airEnsiklopedi nusantara. Mawar Gempita.
Chicago Style (17th ed.) CitationWidjiono, Wasis. Mengenal Tanah AirEnsiklopedi Nusantara. Mawar Gempita, 1989.
MLA (8th ed.) CitationWidjiono, Wasis. Mengenal Tanah AirEnsiklopedi Nusantara. Mawar Gempita, 1989.
Warning: These citations may not always be 100% accurate.