Training Course on Soil Erosion Sedimentation Control and Monitoring( 1988 : Laguna, P. (1988). Proceedings of the Training Course on Soil Erosion Sedimentation Control and Monitoring. Laguna, Philippines : [s.n.].
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Training Course on Soil Erosion Sedimentation Control and Monitoring( 1988 : Laguna, Philippines). Proceedings of the Training Course on Soil Erosion Sedimentation Control and Monitoring. Laguna, Philippines : [s.n.], 1988.
توثيق جمعية اللغة المعاصرة MLA (الإصدار التاسع)Training Course on Soil Erosion Sedimentation Control and Monitoring( 1988 : Laguna, Philippines). Proceedings of the Training Course on Soil Erosion Sedimentation Control and Monitoring. Laguna, Philippines : [s.n.], 1988.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.