APA引文

BROWN, L. R. (1995). Tanda-tanda Zaman Era 90-an / Lester R. Brown. Obor.

Chicago Style (17th ed.) Citation

BROWN, Lestern R. Tanda-tanda Zaman Era 90-an / Lester R. Brown. Obor, 1995.

MLA引文

BROWN, Lestern R. Tanda-tanda Zaman Era 90-an / Lester R. Brown. Obor, 1995.

警告：這些引文格式不一定是100％准確.