Стиль цитування APA (7-ме видання)

Lagemann, J. (1977). Traditional African farming systems in eastern Nigeria: An analysis of reaction to increasing population pressure. Weltforum Verlag.

Чикаго стиль цитування (17-те видання)

Lagemann, Johannes. Traditional African Farming Systems in Eastern Nigeria: An Analysis of Reaction to Increasing Population Pressure. Munchen: Weltforum Verlag, 1977.

Стиль цитування MLA (8-ме видання)

Lagemann, Johannes. Traditional African Farming Systems in Eastern Nigeria: An Analysis of Reaction to Increasing Population Pressure. Weltforum Verlag, 1977.