Frison-Roche, Roger
Selection du livre: Selection du reader's digest
Bruxelles Zurich Monreal, 1981
 Buku Teks
The writrs digest guide to good writing
edited by Thomas Clark ... [and others]
Writers digest Books, 1994
 Buku Referensi
Garman, E. Thomas
The consumer's world enonomicissues and money management
McGraw-Hill, 1979
 Buku Teks
Schoenfeld, David
The Consumer and his dollars / by David Schoenfeld and Arthur A. Natella
Oceana Publications, 1975
 Buku Teks
Selection du livre: Les rougeville clementine
Selection du Reader`s digest
Bruxelles Zurich Monreal, 1981
 Buku Teks