Cita APA (7a ed.)

Francis, D. (1993). Effective problem solving: A structured approach. Routledge.

Cita Chicago Style (17a ed.)

Francis, Dave. Effective Problem Solving: A Structured Approach. London: Routledge, 1993.

Cita MLA (9a ed.)

Francis, Dave. Effective Problem Solving: A Structured Approach. Routledge, 1993.