editor, Garrett Fitzmaurice, Marie Davidian, Geert Verbeke, Geert Molenberghs
CRC Press , 2009
Buku Referensi
Little, Todd D
The Guilford Press, 2013
Buku Teks
Singer, Judith A.
Oxford University Press, 2003
Buku Teks
edited by Roger Penn, Damon Berridge
Sage, 2013
Buku Teks
edited by L. Andries van der Ark
Lawrence Erlbaum Associates, 2005
Buku Teks