Instituto Nacional de Normalización. (2007). Geometrical product specifications GPS Dimensional and geometrical tolerances for moulded parts: Part 3. General dimensional and geometrical tolerances and machining allowances for casting (1a. ed.). INN.
Παραπομπή σε μορφή Chicago (17η εκδ.)Instituto Nacional de Normalización. Geometrical Product Specifications GPS Dimensional and Geometrical Tolerances for Moulded Parts: Part 3. General Dimensional and Geometrical Tolerances and Machining Allowances for Casting. 1a. ed. Ginebra: INN, 2007.
Παραπομπή σε μορφή MLA (9th εκδ.)Instituto Nacional de Normalización. Geometrical Product Specifications GPS Dimensional and Geometrical Tolerances for Moulded Parts: Part 3. General Dimensional and Geometrical Tolerances and Machining Allowances for Casting. 1a. ed. INN, 2007.