Heller Michael. (1992). Introduction to the global structure of space - time: The theorical foundations of cosmology (In lần thứ 1.). Singapore: World Scientific.
শিকাগো স্টাইলে সাইটেশনHeller Michael. Introduction to the Global Structure of Space - Time: The Theorical Foundations of Cosmology. In lần thứ 1. Singapore: World Scientific, 1992.
এমএলএ সাইটেশনHeller Michael. Introduction to the Global Structure of Space - Time: The Theorical Foundations of Cosmology. In lần thứ 1. Singapore: World Scientific, 1992.
সতর্কবাণী: সাইটেশন সবসময় 100% নির্ভুল হতে পারে না.