Nannetti, G. (1960). Ang abakada ng lupa = Alphabet of the soil. United Nations Educational and Scientific Organization; (Manila) : Bureau of Printing.
Chicago-Zitierstil (17. Ausg.)Nannetti, Guillermo. Ang Abakada Ng Lupa = Alphabet of the Soil. [Manila: United Nations Educational and Scientific Organization; (Manila) : Bureau of Printing, 1960.
MLA-Zitierstil (9. Ausg.)Nannetti, Guillermo. Ang Abakada Ng Lupa = Alphabet of the Soil. United Nations Educational and Scientific Organization; (Manila) : Bureau of Printing, 1960.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.