Golzman, S., Hermida, M. A., & Iaconianni, A. (1999). Nature & Environment: Plus Activities Level One. Revised Edition (1a. ed.). Richmond Publishing.
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Chicago-čujuhus (17. p.)
Golzman, Silvana, María Alejandra Hermida, juo Adriana Iaconianni. Nature & Environment: Plus Activities Level One. Revised Edition. 1a. ed. Buenos Aires: Richmond Publishing, 1999.
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MLA-čujuhus (9. p.)
Golzman, Silvana, et al. Nature & Environment: Plus Activities Level One. Revised Edition. 1a. ed. Richmond Publishing, 1999.
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