Não informado. (1973). ASTM Standardization News. American Society for Testing and Materials.
Παραπομπή σε μορφή Chicago (17η εκδ.)Não informado. ASTM Standardization News. Philadelphia, Pa: American Society for Testing and Materials, 1973.
Παραπομπή σε μορφή MLA (8th εκδ.)Não informado. ASTM Standardization News. American Society for Testing and Materials, 1973.
Πρόσοχή: Οι παραπομπές μπορεί να μην είναι 100% ακριβείς.