APA (7th ed.) Citation

Não informado. (1960). Challenge. National Tuberculosis Association of Pakistan.

Chicago Style (17th ed.) Citation

Não informado. Challenge. Karachi, Paquistao: National Tuberculosis Association of Pakistan, 1960.

MLA (8th ed.) Citation

Não informado. Challenge. National Tuberculosis Association of Pakistan, 1960.

Warning: These citations may not always be 100% accurate.