Kemp, F., & Buttle, B. (1980). Looking ahead: A guide to retirement (2nd ed.). Macdonald & Evans.
Cita Chicago (17th ed.)Kemp, Fred, i Bernard Buttle. Looking Ahead: A Guide to Retirement. 2nd ed. Plymouth [Devon]: Macdonald & Evans, 1980.
Cita MLA (8th ed.)Kemp, Fred, i Bernard Buttle. Looking Ahead: A Guide to Retirement. 2nd ed. Macdonald & Evans, 1980.
Atenció: Aquestes cites poden no estar 100% correctes.