APA-referens

Heller Michael. (1992). Introduction to the global structure of space - time: The theorical foundations of cosmology (In lần thứ 1.). Singapore: World Scientific.

Chicago-stil citat

Heller Michael. Introduction to the Global Structure of Space - Time: The Theorical Foundations of Cosmology. In lần thứ 1. Singapore: World Scientific, 1992.

MLA-referens

Heller Michael. Introduction to the Global Structure of Space - Time: The Theorical Foundations of Cosmology. In lần thứ 1. Singapore: World Scientific, 1992.

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