Cita APA (7th ed.)

Uppal, O. [. P. 1. (1975). Practical procedure of classification: (according to C.C. & D.D.C.). Madaan.

Cita Chicago (17th ed.)

Uppal, O.P. [Om Parkash].- 1940. Practical Procedure of Classification: (according to C.C. & D.D.C.). Patiala: Madaan, 1975.

Cita MLA (9th ed.)

Uppal, O.P. [Om Parkash].- 1940. Practical Procedure of Classification: (according to C.C. & D.D.C.). Madaan, 1975.