Cather, Willa, 1873-1947
O pioneers
A Signet Classic, 1988
 Buku Teks
Sucahyani Dwi Astuti
Manifestasi etika Puritan, American dream dan feminisme dalam novel O Pioneers! karya Willa Cather = Manifestation of Puritan, ethic American dream and feminism in an O Pioneers! novel by Willa Cather
Program Pascasarjana Universitas Indonesia, 2013
 UI - Tesis Membership
Kohler, Littleton
Contributions of four accounting pioneers
State University , 1951
 Buku Teks
Portraits of pioneers in psychology
edited by Gregory A. Kimble, Michael Wertheimer, Charlotte White
American Psychological Association, 1991
 Buku Teks
Beek, Leo
Dutch pioneers of science
Van Gorcum, 1985
 Buku Referensi