Cita APA (7th ed.)

Munn, M. S., & Hayward, S. M. How much shall I buy? A mathematical approach to ordering. Imperial Chemical industries.

Cita Chicago (17th ed.)

Munn, Mary S., i Sarah M. Hayward. How Much Shall I Buy? A Mathematical Approach to Ordering. [S.L.]: Imperial Chemical industries.

Cita MLA (8th ed.)

Munn, Mary S., i Sarah M. Hayward. How Much Shall I Buy? A Mathematical Approach to Ordering. Imperial Chemical industries.