Grønvold, J. (1990). Transmission of infective larvae of Ostertagia ostertagi and Cooperia oncophora (Trichostrongylidae: Nematoda): Thesis. Commissioned by DSR Booksellers.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Grønvold, Jørn. Transmission of Infective Larvae of Ostertagia Ostertagi and Cooperia Oncophora (Trichostrongylidae: Nematoda): Thesis. Frederiksberg C, Denmark: Commissioned by DSR Booksellers, 1990.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Grønvold, Jørn. Transmission of Infective Larvae of Ostertagia Ostertagi and Cooperia Oncophora (Trichostrongylidae: Nematoda): Thesis. Commissioned by DSR Booksellers, 1990.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.