A circular : 1

MLA

Proença, Pedro, and Alfonso Martins. A Circular : 1. [s.l.]: A Circular, 2011.

APA

Proença, P., & Martins, A. (2011). A circular : 1. [s.l.]: A Circular.

Chicago

Proença, Pedro, and Alfonso Martins. A Circular: 1. [s.l.]: A Circular, 2011.