Soil Conservation on the Downs Seminar, Toowoomba, Queensland, & Agricultural Technologists of Australasia. (1977). Soil Conservation on the Downs Seminar, Toowoomba D.D.I.A.E., 12 August 1977. Agricultural Technologists of Australasia.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Soil Conservation on the Downs Seminar, Toowoomba, Queensland, و Agricultural Technologists of Australasia. Soil Conservation on the Downs Seminar, Toowoomba D.D.I.A.E., 12 August 1977. Toowoomba, Q.: Agricultural Technologists of Australasia, 1977.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Soil Conservation on the Downs Seminar, Toowoomba, Queensland, و Agricultural Technologists of Australasia. Soil Conservation on the Downs Seminar, Toowoomba D.D.I.A.E., 12 August 1977. Agricultural Technologists of Australasia, 1977.