Gaya APA
Bigman, D, P. (2018).
GPR basics : A handbook for ground penetrating radar users .
Suwanee:
Bigman Geophysical.
Gaya MLA
Bigman, Daniel, P.
"GPR basics : A handbook for ground penetrating radar users".
Suwanee:
Bigman Geophysical,
2018.
Textbook.