Kierkegaard: A Very Short Introduction
Patrick Gardiner
Very Short Introductions Oxford (19)
Khế ước Xã hội
Jean-Jacques Rousseau
Nếu ... thì?
Randall Munroe
A history of mathematics
Victor J. Katz
A History of Abstract Algebra
Israel Kleiner
Analysis I
Herbert Amann & Joachim Escher & Gary Brookfield
Analysis of Herbert Amann (1)
Analysis II
Herbert Amann & Joachim Escher
Analysis of Herbert Amann (2)
Analysis III
Analysis of Herbert Amann (3)