Shaffer, Peter
Equus / Peter Shaffer, editor Adrian Burke
Longmans, 1973
Buku Teks
Shaffer, Thomas L.
Legal interviewing and counseling in a nutshell / Thomas L. Shaffer
West Publishing Company, 1976
Buku Teks
Shaffer, Thomas L.
Legal interviewing and counseling in a nutshell / Thomas L. Shaffer, James R. Elkins
West Publishing, 1987
Buku Teks
Steele, Peter
Peter Porter
Oxford University , 1992
Buku Teks
Peter, Laurence J.
The Peter principle
Souvenir Press, 1994
Buku Teks