Gaya APA
Nichols, M, C., Unger, N, C. (2017).
A Companion to the Gilded Age and Progressive Era .
Singapore:
Wiley Blackwell.
Gaya MLA
Nichols, McKnight,, Christopher., Unger, Nancy, C.
"A Companion to the Gilded Age and Progressive Era".
Singapore:
Wiley Blackwell,
2017.
Text.