APA Баримт

Petrova E. et al & Petrova E., S. T. (1979). Pre-school education in Bulgaria. Sofia.

Чикаго маягийн жагсаалт

Petrova E. et al ба Sheitanova T. Petrova E. Pre-school Education in Bulgaria. Sofia, 1979.

MLA ишлэл

Petrova E. et al ба Sheitanova T. Petrova E. Pre-school Education in Bulgaria. Sofia, 1979.

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