His Thinking mathematically, 1982: CIP t.p. (John Mason) data sheet (b. 3/23/44)

Researching your own practice, 2002: t.p. (John Mason)

Personal communication with author, Jun. 11, 2002 (John Healey Mason; b. Mar. 23, 1944; Prof., Centre of Mathematics Education, Open Univ.)

Thinking mathematically, 2010: t.p. (John Mason)