Cita APA (7th ed.)

Oscar Schaaf & Brannan, R. (1983). Problem solving in mathematics, grade 4: Richard Brannan ... [et al]. Dale Seymour Publications.

Cita Chicago (17th ed.)

Oscar Schaaf i Richard Brannan. Problem Solving in Mathematics, Grade 4: Richard Brannan ... [et Al]. Palo Atlto, CA: Dale Seymour Publications, 1983.

Cita MLA (9th ed.)

Oscar Schaaf i Richard Brannan. Problem Solving in Mathematics, Grade 4: Richard Brannan ... [et Al]. Dale Seymour Publications, 1983.