APA-ийн эшлэл(7 дахь хэвлэлт)

Professional Book Publishers. (2019). The Post Office Act, 1898 (06 of 1898). Professional Book Publishers.

Чикаго-гийн эшлэл (17 дахь хэвлэлт)

Professional Book Publishers. The Post Office Act, 1898 (06 of 1898). New Delhi: Professional Book Publishers, 2019.

MLA -ийн эшлэл (9 дэх хэвлэлт)

Professional Book Publishers. The Post Office Act, 1898 (06 of 1898). Professional Book Publishers, 2019.