Two or More Works by the Same Author in the Same Year: If you have two sources by the same author in the same year, use lower-case letters (a, b, c) with the year to order the entries in the reference list. Use the lower-case letters with the year in the in-text citation.
Most boards measure 84 to 150 centimetres (33 to 59 in) in length while widths vary from 22.8 to 25.4 centimetres (9.0 to 10.0 in). There are several longboard shapes, such as pintails, swallowtails, flat-nose riders, drop-through decks, drop decks and boards with the same shape as a standard skateboard.
Whiteboards come in many shapes, sizes and with different types of dry erase writing surfaces. There are porcelain steel, magnetic receptive whiteboards in either a standard high gloss or a low gloss finish for projection purposes, there is a HPL or high pressure laminate whiteboard, and there are also the economy Melamine whiteboards.