Wartomo, H. et al.(1990, 1995).Pemuliaan ternak / E.J. Warwick, J. Maria Astuti, Wartomo Hardjosubroto (Cet.4,5).:Gadjah Mada University Press.
Gaya MLA
Hardjosubroto, Wartomo. et al."Pemuliaan ternak / E.J. Warwick, J. Maria Astuti, Wartomo Hardjosubroto".Cet.4,5:Gadjah Mada University Press,1990, 1995.Textbook.