Spielmann , P. E. (1918). Tables of chemical and physical constants: Of special interest to the light naphtha section of the coal tar and coke oven industries. His Majesty Stationery Office.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Spielmann , Percy Edwin. Tables of Chemical and Physical Constants: Of Special Interest to the Light Naphtha Section of the Coal Tar and Coke Oven Industries. London: His Majesty Stationery Office, 1918.
توثيق جمعية اللغة المعاصرة MLA (الإصدار التاسع)Spielmann , Percy Edwin. Tables of Chemical and Physical Constants: Of Special Interest to the Light Naphtha Section of the Coal Tar and Coke Oven Industries. His Majesty Stationery Office, 1918.
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