(1991). Boar semen preservation II: Proceedings, second International Conference on Boar Semen Preservation / dedicated to the memory of Kjell Larsson ; general editors, Lawrence A. Johnson, Detlef Rath ; associate editors, Karl F. Weitze, Ben Colenbrander ; held at United Sttes Department of Agriculture, Agricultural Research Service, Beltsville, Maryland, USA, August, 1990.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Boar Semen Preservation II: Proceedings, Second International Conference on Boar Semen Preservation / Dedicated to the Memory of Kjell Larsson ; General Editors, Lawrence A. Johnson, Detlef Rath ; Associate Editors, Karl F. Weitze, Ben Colenbrander ; Held at United Sttes Department of Agriculture, Agricultural Research Service, Beltsville, Maryland, USA, August, 1990. 1991.
توثيق جمعية اللغة المعاصرة MLA (الإصدار التاسع)Boar Semen Preservation II: Proceedings, Second International Conference on Boar Semen Preservation / Dedicated to the Memory of Kjell Larsson ; General Editors, Lawrence A. Johnson, Detlef Rath ; Associate Editors, Karl F. Weitze, Ben Colenbrander ; Held at United Sttes Department of Agriculture, Agricultural Research Service, Beltsville, Maryland, USA, August, 1990. 1991.