APA (7 ম সংস্করণ) উদ্ধৃতি

INTERNATIONAL LABOUR OFFICE. (1993). GENERAL ENVIRONMENTAL MANAGEMENT. INTERNATIONAL LABOUR ORGANIZATION.

শিকাগো স্টাইল (17 তম সংস্করণ) উদ্ধৃতি

INTERNATIONAL LABOUR OFFICE. GENERAL ENVIRONMENTAL MANAGEMENT. GENEVA: INTERNATIONAL LABOUR ORGANIZATION, 1993.

M.L.A (9 ম সংস্করণ) উদ্ধৃতি

INTERNATIONAL LABOUR OFFICE. GENERAL ENVIRONMENTAL MANAGEMENT. INTERNATIONAL LABOUR ORGANIZATION, 1993.