Goncalves, Rui Mario, author
Pintura e escultura em Portugal, 1940-1980
Instituto de Cultura e Lingua Portuguesa, 1991
 Buku Teks
Johnson, David W., 1940-, author
Joining together : group theory and group skills
Allyn and Bacon, 1997
 Buku Teks
Johnson, David W., 1940-, author
Joining together : group theory and group skills
Allyn and Bacon, 2000
 Buku Teks
Johnson, David W., 1940-, author
Joining together : group theory and group skills
Pearson Education, 2006
 Buku Teks
Hilger, M. Inez
Together with the Ainu: a vanishing people / by M. Inez Hilger
The University of Oklahoma Press, 1971
 Buku Teks