Use lower case when referring to numbered pages, and avoid using p (for page) and pp (for pages) in body text:
When quoting page numbers, give the first and last page numbers in full, and separate the numbers by an en dash; do not use commas (or spaces) in numbers with more than 4 digits:
10–13 11–19 132–138 428–500 1562–1568 13542–13555
Alternatively, the last page number (except for numbers between 10 and 19) can be abbreviated:
10–13 11–19 105–7 132–8 428–500 1562–8 13542–55
