Gaya APA

Eric, R., Verdoodt,Ann, . (2005). Land Evaluation Part I : Principles In Land Evaluation . Belgium: International Training Centre for Eremology Faculty of Polytechnics Pleinlaan 2.

Gaya MLA

Eric, Ranst,Van., Verdoodt,Ann, . "Land Evaluation Part I : Principles In Land Evaluation". Belgium: International Training Centre for Eremology Faculty of Polytechnics Pleinlaan 2, 2005. Text.