Answer:
and where are the sentences
According to APA style regarding parenthetical citation, you will need to use the surnames of both authors separated by the symbol (&) and followed by the year for example (Robinson & Pearl, 2004) in case you want to refer to one written book by both authors. On the other hand, if you are referring to two different books and considering they share the same surname, you will have to include the initials of the authors, the year of each book and separate both authors using a semicolon. In this case, you will have to use the following format ( E. Barret Browning, 1990; R. Browning,1981)
This could be caused by one of three things: (1) Your tree is growing more leaves than it can support, (2) pests and diseases infect the leaves, or (3) your tree might be getting too much or too little water.
