Cita APA (7th ed.)
(1994). Practical problem solver: Substitutes short cuts and ingenious solutions (ed.). The reader's digest association.
Cita Chicago (17th ed.)
Practical Problem Solver: Substitutes Short Cuts and Ingenious Solutions. ed. Cape Town: The reader's digest association, 1994.
Cita MLA (9th ed.)
Practical Problem Solver: Substitutes Short Cuts and Ingenious Solutions. ed. The reader's digest association, 1994.
Atenció: Aquestes cites poden no estar 100% correctes.