Sergio Elliot. (1990). FAO economic and social development paper N.67: Distance education systems. Rome: FAO.
Chicago-стиль цитированияSergio Elliot. FAO Economic and Social Development Paper N.67: Distance Education Systems. Rome: FAO, 1990.
MLA-цитированиеSergio Elliot. FAO Economic and Social Development Paper N.67: Distance Education Systems. Rome: FAO, 1990.
Предупреждение: эти цитированмия не могут быть всегда правильны на 100%.