Wasinee Khwaiphan และ Thaweesakdi Boonkerd. (2005) Diversity of ferns and fern allies at Khao Khiao area in Khao Yai National Park. Chulalongkorn University:ม.ป.ท.Wasinee Khwaiphan และ Thaweesakdi Boonkerd. 2005. Diversity of ferns and fern allies at Khao Khiao area in Khao Yai National Park. ม.ป.ท.:Chulalongkorn University;Wasinee Khwaiphan และ Thaweesakdi Boonkerd. Diversity of ferns and fern allies at Khao Khiao area in Khao Yai National Park. ม.ป.ท.:Chulalongkorn University, 2005. Print.