Citazione APA

Lal & Goswami, P. K. Upkar's objective arithmetic. Upkar Prakashan.

Stile di citazione Chicago

Lal e P K. Goswami. Upkar's Objective Arithmetic. Agra: Upkar Prakashan.

Citazione MLA

Lal e P K. Goswami. Upkar's Objective Arithmetic. Upkar Prakashan.