APA Style
Freguglia, P., Giaquinta, M. (2016).
The Early Period of the Calculus of Variations .
Birkhäuser Cham:
Birkhäuser Cham.
MLA Style
Freguglia, Paolo., Giaquinta, Mariano.
"The Early Period of the Calculus of Variations".
Birkhäuser Cham:
Birkhäuser Cham,
2016.
Text.