APA Баримт

(1991). The 1991 World book year book: The annual supplement to the world book encyclopedia. ЗАО "Росмэн прэсс".

Чикаго маягийн жагсаалт

The 1991 World Book Year Book: The Annual Supplement to the World Book Encyclopedia. chicago: ЗАО "Росмэн прэсс", 1991.

MLA ишлэл

The 1991 World Book Year Book: The Annual Supplement to the World Book Encyclopedia. ЗАО "Росмэн прэсс", 1991.

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