Gaya APA
Robertson, Stephen. (2020).
B C, Before Computers .
:
Open Book Publishers.
Gaya Chicago
Robertson, Stephen.
B C, Before Computers.
:
Open Book Publishers,
2020.
Electronic Resource.
Gaya MLA
Robertson, Stephen.
B C, Before Computers.
:
Open Book Publishers,
2020.
Electronic Resource.
Gaya Turabian
Robertson, Stephen.
B C, Before Computers.
:
Open Book Publishers,
2020.
Electronic Resource.